Mesa (master): llvmpipe: clamp texcoords in lp_build_sample_compare()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 2c1ef65a04de8d61fddee55c7a2f0673d69235d5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2c1ef65a04de8d61fddee55c7a2f0673d69235d5

Author: Brian Paul <brianp at vmware.com>
Date:   Mon Mar  7 18:59:39 2011 -0700

llvmpipe: clamp texcoords in lp_build_sample_compare()

See previous commit for more info.

NOTE: This is a candidate for the 7.10 branch.

---

 src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
index 1fec3ad..9961ba0 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
@@ -1108,6 +1108,11 @@ lp_build_sample_compare(struct lp_build_sample_context *bld,
                       coord, tex);
    }
 
+   /* Clamp p coords to [0,1] */
+   p = lp_build_clamp(&bld->coord_bld, p,
+                      bld->coord_bld.zero,
+                      bld->coord_bld.one);
+
    /* result = (p FUNC texel) ? 1 : 0 */
    res = lp_build_cmp(texel_bld, bld->static_state->compare_func,
                       p, texel[chan]);